Archived posting to the Leica Users Group, 1998/09/21

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Subject: Re: [Leica] Lens wt vs finish->Now question about titanium
From: Dan Cardish <dcardish@microtec.net>
Date: Mon, 21 Sep 1998 16:55:15 -0400

You make it sound as if titanium is not sutable for camera bodies either!
Thank you for clarifying the issue.

Dan C.

At 03:26 PM 21-09-98 -0400, Frank wrote:
>
>Dan Cardish wrote
>
>"I have been told that titanium is no more coslty than steel, and not any
>more difficult to machine."
>
>Sorry Don you have been told wrong. 
> Loads of "high tech" materials are used in consumer goods for marketing or
>fashion  reasons only. (They are often used inappropriately by engineers as
>well!)
[snip]
>Titanium is certainly excellent at corrosion resistance but the 6Al4V
>normal alloy is not especially strong and all Ti alloys are extremely notch
>sensitive and prone to cracking. Also because of its low Youngs modulus
>Titanium parts are not very stiff. Still its a good material for a very
>limited number of applications. It is specified far to often for
>fashionable rather than technically sound reasons!
>
>Ti does not make a very good choice for a lens barrel in my view.